<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>
    <style>
        .box {
          width: 300px;
          height: 300px;
          /* background-color: red; */
          border: 1px solid #000;
        }
      </style>
    </head>
    <body>
      <div class="box"></div>
      <script>
        const oBox = document.querySelector(".box");
  
        //鼠标移动事件 的 lodash的使用
         function center(e) {
          console.log("center");
          console.log(e);
          console.log(this);
        }
        oBox.onmousemove = _.throttle(center, 300);
  
        // function enter() {
        //   this.style.background = "red";
        // }
  
        // function leave() {
        //   this.style.background = "";
        // }
        // oBox.onmouseenter = _.throttle(enter, 3000, {
        //   //lodash的节流提供两个配置,leading控制节流返回的回调函数是否在初始的时候触发,trailing控制节流返回的回调函数是否在最后也触发
        //   leading: true,
        //   trailing: false,
        // });
        // oBox.onmouseleave = leave;
      </script>
    </body>
  </html>
  